Distribution, mode of occurrence, and significance of rare-earth elements in coal from Samaleswari open cast coal blocks, Odisha, India with their provenance and paleodepositional environment

Kumari, Sneha and Roy, T and Chakladar, S and Kumar, Alok and Arif, Md and Mohanty, Ashok and Kundu, Rajen and Chakravarty, S (2023) Distribution, mode of occurrence, and significance of rare-earth elements in coal from Samaleswari open cast coal blocks, Odisha, India with their provenance and paleodepositional environment. Environmental Earth Sciences, 82(5) .

Full text not available from this repository.

Abstract

This study aims to thoroughly examine the distribution, concentration, and occurrence of a broad selection of REEs and major elements in coal samples from Samaleswari coal block, IB valley, Odisha, India using advanced geochemical tools. A total of 85 coal samples from four boreholes were characterized using proximate analysis and calorific value measurements. The corresponding ash samples were examined using X-ray Diffraction (XRD), X-ray Fluorescence (XRF), Electron Probe Microanalyzer (EPMA), and Inductively Coupled Plasma Mass Spectrometry (ICP-MS).The coal ash samples were delineated to be rich in SiO2 (42-65%) along with a lower proportion of Al2O3 (24-41%), Fe2O3 (5-6%), and TiO2 (1-2%). The average concentration of REEs in the four boreholes was found to be 510 ppm, with the distribution pattern being Ce > La > Nd > Y > Pr > Sc > Sm > Gd > Dy > Er > Yb > Eu > Ho > Tb > Tm > Lu. The concentration of critical REEs varied in the range of 100-300 ppm, and outlook coefficient (C-outl) ranged from 0.7 to 1.0, demonstrating our coal seams' suitability as a promising source of REEs. A higher concentration of REEs in BH1 was correlated with a relatively higher proportion of apatite. The increment in REE concentration with depth was speculated to be due to their close association with hematite, especially in BH1 and BH2. A strong positive correlation of all the REEs with clay minerals and specifically TiO2 reinstates their abundance in fine-grained clastic sedimentary rocks which are not significantly affected by weathering. Point analysis using EPMA and Scanning Electron Microscope-Energy Dispersive Analysis X-ray (SEM-EDAX) confirmed the co-existence of La, Ce, Pr, and Nd in the Fe-containing aluminosilicate matrix. In addition, the major oxide ratio and their plot entail terrestrial depositional environment in the basin during coal formation and deposited in semi-arid climatic conditions.

Item Type:Article
Official URL/DOI:https://10.1007/s12665-023-10777-7
Uncontrolled Keywords:Samaleswari coal, rare-earth element distribution, pearson correlation, geochemistry, mineralogy, paleodepositional conditions, mineral matter, permian coals, fly-ash, coalfield, geochemistry, deposit, enrichment, district, province, orissa
Divisions:Material Science and Technology
ID Code:9407
Deposited By:HOD KRIT
Deposited On:02 Nov 2023 10:33
Last Modified:02 Nov 2023 10:33
Related URLs:

Repository Staff Only: item control page